John fotteell



UNITED STATES PATE T OFFICE.

JOHN FOTTRELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THOMAS s. LEIGH, TRUSTEE, OF SAME PLACE.

COMPOSITION FOR ELECTRICAL INSULATION.

SPECIFICATION forming part of Letters Patent No. 294,457, dated March 4, 1884;, Application filed JanuaI-y 7,1884. (No'specimcns) T0 on whom it ntuty concern "Be it known that I, JOHN FOTTRELL, a subject of the Queen of Great Britain, residing in the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Composition for Electrical Insulation, of which the following is a specification;

In carrying out my invention Ifirst prepare metallic soap, which may be accomplished in various Ways, the following being most suitable: One pound of common brown soap is thoroughly dissolved in two gallons of hot water. In another vessel one and a quarter pound of alum is thoroughly dissolved in two gallons of hot water. The dissolved soap and alum are now mixed together, the result being a flocculent mass of metallic soap, which is at terward removed from the water and dried by any suitable means. The metallic soap is dissolved in benzine, turpentine, or gasoline, one gallon thereof being employed to one pound of the soap, and to the same I add one gallon of boiled linseed-oil, all Well'stirred together, and half-gallon copal varnish, or any other good varnish, well stirred with the previous mixture of metallic soap and boiled linseedoil. The proportions of the different ingredients may be varied as required. The solution is now adapted for saturating cotton sil k, or other fibrous covered'w'ires,thus rendering BhQH IJZLZWBLEPITOOf and electrically insulatedim a durable manner, the means employed being inexpensive and easily applied.

Should it be desired to thicken the mixture, it may be accomplished by means of white oxide of zinc ground in oil or white lead-such as is used by house-paintersor the oxide of zinc or white lead may be used in powder form and ground with the mixture hereinbefore described until a paint of proper consistency is obtained. Any other suitable powder JOHN FOTTRELL.

Witnesses:

THos. S. LEIGH, JOHN A. WIEDERsHEIM. 

